I am usind vmWare vCenter Converter Standalone 5.0 to run a P2V on a server that is running Windows 2003. I have ran two different P2V's this 2003 server with success over the past three week. I am tryng to run another P2V on this server now. On the deploying of the agent I receive the following error "Unable to complete vCenter Converter install. Error code 1,603".

Any suggestions on how to resolve this issue?

Why would this error start now after running successfully, everything I was reading was saying to check port settings, none o those have changed.

You probably have instructed the agent to auto deinstall during the previous conversions. The agent installs along with two drivers and sometimes deinstallation may require system reboot. Not sure whether this is your case.

You may try to install the agent manually on the source machine. The agent installer can be found on the machine where converter server is installed - %ProgramFiles%\VMware\VMware vCenter Converter Standalone\VMware-Converter-Agent.exe